chart.js 2.1

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.1.0/Chart.bundle.min.js"></script>
<canvas id="canvas"></canvas>

JavaScript

var data = {
			labels: ["8", "7", "9", "11", "10"],
			datasets: [{
				type: "bar",
				label: "Asistencia",
				borderColor: "#56B513",
				backgroundColor: "#56B513",
				data: [16, 11, 9, 6, 5],
				yAxisID: 'y-axis-1'
			}, {
				type: "bar",
				label: "Solución",
				borderColor: "#000FAA",
				backgroundColor: "#000FAA",
				data: [16, 11, 9, 6, 5],
				yAxisID: 'y-axis-1'
			}]
		};

		var options = {
			animation: {
				onComplete: function () {
					var ctx = this.chart.ctx;
					ctx.textAlign = "center";
					ctx.textBaseline = "middle";
					var chart = this;
					var datasets = this.config.data.datasets;

					datasets.forEach(function (dataset, i) {
						ctx.font = "20px Arial";
						switch (dataset.type) {
							case "line":
								ctx.fillStyle = "Black";
								chart.getDatasetMeta(i).data.forEach(function (p, j) {
									ctx.fillText(datasets[i].data[j], p._model.x, p._model.y - 20);
								});
								break;
							case "bar":
								ctx.fillStyle = "White";
								chart.getDatasetMeta(i).data.forEach(function (p, j) {
									ctx.fillText(datasets[i].data[j], p._model.x, p._model.y + 20);
								});
								break;
						}
					});
				}
			},
			scales: {
				xAxes: [{
					stacked: true,
					scaleLabel: {
						display: true,
						labelString: "Estaciones"
					}
				}],

				yAxes: [{
					type: "linear",
					position: "left",
					id: "y-axis-1",
					stacked: true,
					ticks: {
						suggestedMin: 0
					},
					scaleLabel: {
						display: true,
						labelString: "Minutos"
					}
				}, {
					type: "linear",
					position: "right",
					id: "y-axis-2",
					ticks: {
						suggestedMin: 0,
						callback: function (value) {
							return value + "%";
						}
					},
					scaleLabel: {
						display: true,
						labelString: "Porcentaje"
					}
				}]
			}
		};


			var ctx = document.getElementById("canvas").getContext("2d");

			window.myBar = new Chart(ctx, {
				type: 'bar',
				data: data,
				options: options
			});